Intake manifold for internal-combustion engines



H. S. BENJAMIN. INTAKE MANIFOLD FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED MAR. 3. I920.

Patented Oct. W, 1922.

Patented @ct. lid, 11922. @Trhfifi innate PATENT. @l f ififi.

HARRY S. BENJAMIN, OF DETROIT, MICHIGAN, ASSIGNQE EKG BENJAMUI MGTUEZ PRODUCTS 00., 0F DETRUIT, MICHIGAN, A CQRPURATION @ie" DELAWARE.

INTAKE MANIFOLD FOR INTERNAL-COMBUSTION ENGINES' Application filed March a, 1920. Serial at. aeaaea To all whom it may concern:

Be it known that I, HARRY a citizen of the United States, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Intake Manifolds for Internal-Combustion Engines, of which the following is a description.

My invention belongs generally to the class of intake manifolds arranged to conduct the explosive charge of an internal combustion engine from the carbureter to the intake ports. It has for its object the production of such a device adapted to perform the functions set forth in an edicient manner, andv which is. particularly adapted to more efficiently handle such mixtures carrying the heavier hydrocarbons.

To this end my invention consists in the novel construction, arrangement and combination of parts herein shown and described, and more particularly set forth in the claims.

This application is one of a series of cases including my co-pending applications Serial Nos. 347,586 and 369,264.

In the drawings, wherein like reference characters indicate like or corresponding parts,

Figure 1 is a side elevation of a portion of the exhaust manifold with the intake manifold and associated parts in position in relation thereto and Figure 2 is a central vertical section through the center of the intake manifold in a lengthwise direction.

In the drawings, 1 indicates the exhaust manifold and 2 the carbureter. Positioned within the exhaust manifold in such manner as to be substantiall integral therewith, is a pipe 3 provide with a plurality of branches, for illustration the three branches 4, 5, and 6. The intake manifold proper 7 is provided with extensions 8, 9, and 10 adapted to register with and be secured to said extensions 4, 5 and 6 substantially as indicated. The part 8 is preferablycentrally positioned above the intake manifold, and is dome-shaped or extended upward from the main body of the intake manifold at that point, so that the incoming charge coming through the neck 11 has a tendency to be carried upward into said dome 8. The two lateral branches 12-12 of the intake manifold are extended outward beyond the S. BENJAMIN,-

pipes 5 and 6, and are connected to the intake ports. Just before the lateral branches 12-12 come into alignment with the PIPES 5 and 6, they are reduced to form venturis 13-13, the central line of the reducedportions of the venturis preferabiy belng 1n proximityto the walls of the pines 5 and 6 next to the dome 8.v

In practice T have formed the pipe 3 substantially as shown and of suitable rnaterial, and have positioned the same in the core employed in casting the exhaust manifold 1. By this means the pipe 3 is formed substantially integral with the exhaust manifold. Any other means, however, securing the same results would serve the purpose.

In actual practice T have secured satisfactory results by forming the parts substantially as indicated, and of the following dimensions. The diameter of the neck 11, substantially one inch, the diameter of the venturis at the shortest point, substantially eleven-sixteenths of an inch, the diameter of the tube on pipe 3 five-sixteenths of an inch, and the diameter of the intake manifold between the venturis and the intake pois substantially fifteen-sixteenths of an inc A device constructed in accordance with these dimensions is adapted for use upon the size or type ef car known as the Ford car. The proportions would be varied according to the size of the engine and associated parts.

Any preferred means maybe employed for firmly and tightly securing the ends of the pipes 4', 5 and 6 to the cooperating extensions 8, 9, and 10. As shown, the extensions 8, 9, and 10 are internally threaded. A. cooperating part 14, 15 and 16 provided with ahead adapted to receive a wrench, is externally threaded to cooperate with the extensions 8, 9 and 10. A suitable gasket 1.7 may be employed in each case, the shoulder within the parts 8, 9, and 10 being slightly inclined, so that as the nuts 14, 15 and 15 are screwed home the gasket will be forced downwardly and inwardly, snugly embracing the ends of the pipes 4, 5 and 6.

The mode of operation is apparent. The incoming charge tends to be carried by its momentum upward into the dome 8, the heavier particles ac uiring a greater momentum than the lighter. The capacity of the pipe l, however, is not suihcient to take the full charge, which is therefore divided and parts of which proceed through the extensions 12-42, through the venturis 13, by the ends of the pipes 5 and 6, and thence to the intake ports. The action is thus that the heavier particles are carried upward through the pipe a into the horizontal section of the pipe 3, which is heated by the exhaust gases, said heated gases being conducted through the pipes 5 and 6 and discharged into the path of those portions of the charge which will pass through the parts 1212 and the venturis Iii-13. The venturis are preferably positioned just before a central line through the pipes 5 and 6, the reduced portions thereof serving to increase the velocity of the passing charge, and thus by an action similar to a syphon action, aiding in the delivery of the heated gases through the pipes 5 and 6.

it will be seen that by my improved device no valves or movable parts are necessary to secure effective operation, which is at all times automatic in its action.

Having thus described my invention, it is obvious that various immaterial modifications may be made in the same without departing from the spirit of my invention; hence I do not Wish to be understood as limiting myself tothe exact form, construction, arrangement and combination of'parts herein shown and described, or uses mentioned.

What I claim as new and desire to secure by Letters Patent is:

1. A device of-the kind described comprising an intake manifold provided with a neck adapted to cooperate with a carbureter, a central dome positioned substantially above said neck, and inlet openings in the manifold on each side of said dome,'in combination with a cooperating pipe positioned within the exhaust manifold with extensions arnaaiaao ranged to register with said dome and the two inlet openings, means for connecting said extensions to the intake manifold, and ve'nturis positioned in the manifold in proximity to the said two inlet openings.

9. A device of the kind described comprising an intake manifold provided with a neck arranged to receive the charge from a carbureter, a centrally arranged dome above the neck, an intake opening in the manifold on each side of said dome, and venturis positioned in the manifold with the narrowest part thereof near the wall of the intake openings nearest the dome, in combination with an exhaust manifold, a cooperating pipe positioned in the exhaust manifold with three extensions in alignment with the centraldome and the twointake openings, and means for securing said extensions to the cooperating parts in the intake manifold.

3. A device of the kind desizribed comprising the exhaust manifold of an internal combustion engine, a cooperating intake manifold therefor provided with a neck adapted to cooperate with the carbureter, a central opening in the intake manifold positioned substantially above said'neck, and a plurality of additional openings in the manifold, in combination with a cooperating pipe positioned Within the exhaust manifold with extensions arranged to register with the said central opening and with. the other inlet openings, means for connecting said extensions to the inlet manifold, and venturis arranged in the inlet manifold in proximity to the additional inlet 0 enings.

In testimony whereof, l have hereunto signed my name in the presence of two subscribing witnesses.

HARRY S. BENJAMIN. Witnesses:

JOHN W. Hnnn, BERTHA HARTMANN. 

